The Lookner photo only shows 8 sections (2 rows x 4 columnns) within the upper oval part of the grill.
The RV bomb does not have that same oval section, it has three rows. Still trying to pin down the years with photos.
I’d think it would be pretty easy to get the VIN from that guy’s registration info on the state database and compare it to one they can recover from the exploded RV. I’d have to think there is enough of the vehicle left to do so. Even the first WTC explosion in NYC in 93 was identified that way.
In what picture did you see the grill clearly enough to count the sections?
Looking at the crime scene photo, it looks like the smaller grill, with the top of the bumper appearing as if it’s a second row of grill, because of the light conditions and elevated shot.